We propose a surface ion trap design incorporating microwave control electrodes for near-field single-qubit control. The electrodes are arranged so as to provide arbitrary frequency, amplitude and polarization control of the microwave field in one trap zone, while a similar set of electrodes is used to null the residual microwave field in a neighbouring zone. The geometry is chosen to reduce the residual field to the 0.5% level without nulling fields; with nulling, the crosstalk may be kept close to the 0.01% level for realistic microwave amplitude and phase drift. Using standard photolithography and electroplating techniques, we have fabricated a proof-of-principle electrode array with two trapping zones. We discuss requirements for the microwave drive system and prospects for scalability to a large two-dimensional trap array.
@article{arxiv.1308.2078,
title = {Microwave control electrodes for scalable, parallel, single-qubit operations in a surface-electrode ion trap},
author = {D. P. L. Aude Craik and N. M. Linke and T. P. Harty and C. J. Ballance and D. M. Lucas and A. M. Steane and D. T. C. Allcock},
journal= {arXiv preprint arXiv:1308.2078},
year = {2016}
}